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Opened 7 years ago

Last modified 7 years ago

#1119 new How to

Photon Isolation

Reported by: Abhishek Iyer Owned by:
Priority: minor Milestone:
Component: Delphes code Version: Delphes 3
Keywords: Cc:

Description

Hi,
I have a question regarding the size of the inner cone around which the outer isolation cone is constructed.
I have read that it is typically composed of a bunch of e-cal cells with size R ~ 0.1.
What is the convention followed in Delphes for this?

thanks
Abhishek

Change History (2)

comment:1 by Michele Selvaggi, 7 years ago

Hi,

as default no inner cone is used, since the photon candidate is exlcuded from the isolation variable calculation.
If you insist on applying one, you can by adding the following to the card, as done here:

​https://github.com/delphes/delphes/blob/master/cards/CMS_PhaseII/CMS_PhaseII_Substructure_PIX4022_0PU.tcl#L1011-L1012

Michele

comment:2 by Abhishek Iyer, 7 years ago

Hi,
Thank you very much for the prompt reply.
Just a quick follow up. The photon candidate in question has a finite size right? If yes, what is the size of it?

thanks
Abhishek

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